diff --git a/sdk_container/src/third_party/coreos-overlay/coreos/config/coreos_version.sh b/sdk_container/src/third_party/coreos-overlay/coreos/config/coreos_version.sh
deleted file mode 100755
index e5a7b785c8..0000000000
--- a/sdk_container/src/third_party/coreos-overlay/coreos/config/coreos_version.sh
+++ /dev/null
@@ -1,77 +0,0 @@
-#!/bin/sh
-
-# Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-# CoreOS version information
-#
-# This file is usually sourced by other build scripts, but can be run
-# directly to see what it would do.
-
-#############################################################################
-# SET VERSION NUMBERS
-#############################################################################
-# Release Build number.
-# Increment by 1 for every release build.
-# COREOS_BUILD=0000
-
-# Release Branch number.
-# Increment by 1 for every release build on a branch.
-# Reset to 0 when increasing release build number.
-# COREOS_BRANCH=0
-
-# Patch number.
-# Increment by 1 in case a non-scheduled branch release build is necessary.
-# Reset to 0 when increasing branch number.
-# COREOS_PATCH=0
-
-# Source COREOS_* from manifest
-VERSION_FILE="${GCLIENT_ROOT:-/mnt/host/source}/.repo/manifests/version.txt"
-if [ ! -f "$VERSION_FILE" ]; then
-    echo "$VERSION_FILE does not exist!" >&2
-    exit 1
-fi
-
-source "$VERSION_FILE"
-if [ -z "$COREOS_BUILD" ] || \
-   [ -z "$COREOS_BRANCH" ] || \
-   [ -z "$COREOS_PATCH" ]
-then
-    echo "$VERSION_FILE is invalid!" >&2
-    exit 1
-fi
-
-export COREOS_BUILD COREOS_BRANCH COREOS_PATCH
-export CHROMEOS_BUILD=${COREOS_BUILD}
-export CHROMEOS_BRANCH=${COREOS_BRANCH}
-export CHROMEOS_PATCH=${COREOS_PATCH}
-
-# Major version for Chrome.
-# TODO(marineam): expunge this one...
-export CHROME_BRANCH=26
-
-# Official builds must set COREOS_OFFICIAL=1 or CHROMEOS_OFFICIAL=1.
-: ${COREOS_OFFICIAL:=${CHROMEOS_OFFICIAL}}
-if [ ${COREOS_OFFICIAL:-0} -ne 1 ]; then
-  # For developer builds, overwrite CHROMEOS_VERSION_PATCH with a date string
-  # for use by auto-updater.
-  export COREOS_PATCH=$(date +%Y_%m_%d_%H%M)
-  export CHROMEOS_PATCH=${COREOS_PATCH}
-fi
-
-# Version string. Not indentied to appease bash.
-export COREOS_VERSION_STRING=\
-"${COREOS_BUILD}.${COREOS_BRANCH}"\
-".${COREOS_PATCH}"
-export CHROMEOS_VERSION_STRING="${COREOS_VERSION_STRING}"
-
-# Set CHROME values (Used for releases) to pass to chromeos-chrome-bin ebuild
-# URL to chrome archive
-# TODO(marineam): expunge these too...
-export CHROME_BASE=
-# export CHROME_VERSION from incoming value or NULL and let ebuild default
-export CHROME_VERSION="$CHROME_VERSION"
-
-# Print (and remember) version info.
-echo "CoreOS version: ${COREOS_VERSION_STRING}"
diff --git a/sdk_container/src/third_party/coreos-overlay/coreos/config/make.conf.amd64-host b/sdk_container/src/third_party/coreos-overlay/coreos/config/make.conf.amd64-host
deleted file mode 100644
index 712135b54a..0000000000
--- a/sdk_container/src/third_party/coreos-overlay/coreos/config/make.conf.amd64-host
+++ /dev/null
@@ -1,8 +0,0 @@
-# See "man make.conf" for the available options.
-
-# This is used by profiles/base/profile.bashrc to figure out that we
-# are targeting the cros-sdk (in all its various modes).  It should
-# be utilized nowhere else!
-CROS_SDK_HOST="cros-sdk-host"
-
-source /etc/portage/make.conf.host_setup
diff --git a/sdk_container/src/third_party/coreos-overlay/coreos/config/make.conf.amd64-target b/sdk_container/src/third_party/coreos-overlay/coreos/config/make.conf.amd64-target
deleted file mode 100644
index 4b64c069c6..0000000000
--- a/sdk_container/src/third_party/coreos-overlay/coreos/config/make.conf.amd64-target
+++ /dev/null
@@ -1,12 +0,0 @@
-# Copyright (c) 2009 The Chromium OS Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-# Pull in definition of at least { ROOT, CHOST, [BOARD_OVERLAY] }
-source make.conf.board_setup
-
-# Common settings across all board targets.
-source make.conf.common
-
-# Allow the user to override or define additional settings.
-source make.conf.user
diff --git a/sdk_container/src/third_party/coreos-overlay/coreos/config/make.conf.common-target b/sdk_container/src/third_party/coreos-overlay/coreos/config/make.conf.common-target
deleted file mode 100644
index f292477e92..0000000000
--- a/sdk_container/src/third_party/coreos-overlay/coreos/config/make.conf.common-target
+++ /dev/null
@@ -1,35 +0,0 @@
-# Copyright (c) 2009 The Chromium OS Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-# NOTE: This assumes that the following have already been defined:
-#  { ROOT, ARCH, CHOST, [BOARD_OVERLAY] }
-
-# TODO: This will have to come from somewhere else when we support a 32-bit
-# build host environment.
-CBUILD=x86_64-pc-linux-gnu
-HOSTCC=x86_64-pc-linux-gnu-gcc
-
-# Be sure we don't overwrite pkgs from another sysroot.
-PKGDIR=${ROOT}packages/
-PORTAGE_TMPDIR=${ROOT}tmp/
-
-PORT_LOGDIR=${ROOT}tmp/portage/logs/
-
-PKG_CONFIG_PATH="${ROOT}usr/lib/pkgconfig/:${ROOT}usr/share/pkgconfig/"
-
-PORTDIR="/usr/local/portage/stable"
-
-PORTDIR_OVERLAY="
-  /usr/local/portage/coreos
-  ${BOARD_OVERLAY}
-  ${PORTDIR}
-"
-
-# Adding packages to the @world set causes people more trouble than it's
-# worth in our setup -- we rarely have people add custom packages outside
-# of the ChromiumOS set.  You can use "--select" to override this.
-EMERGE_DEFAULT_OPTS="--oneshot"
-
-# Since our portage comes from version control, we redirect distfiles.
-DISTDIR="/var/lib/portage/distfiles-target"
diff --git a/sdk_container/src/third_party/coreos-overlay/coreos/config/stable_versions b/sdk_container/src/third_party/coreos-overlay/coreos/config/stable_versions
deleted file mode 100644
index 5ae0d04dd0..0000000000
--- a/sdk_container/src/third_party/coreos-overlay/coreos/config/stable_versions
+++ /dev/null
@@ -1,2 +0,0 @@
-stage 20100309/stage3-amd64-20100309.tar.bz2
-portage portage-20100310.tar.bz2
diff --git a/sdk_container/src/third_party/coreos-overlay/coreos/config/sudoers b/sdk_container/src/third_party/coreos-overlay/coreos/config/sudoers
deleted file mode 100644
index 4fdbf04231..0000000000
--- a/sdk_container/src/third_party/coreos-overlay/coreos/config/sudoers
+++ /dev/null
@@ -1,31 +0,0 @@
-# sudoers file.
-#
-# This file MUST be edited with the 'visudo' command as root.
-# Failure to use 'visudo' may result in syntax or file permission errors
-# that prevent sudo from running.
-#
-# See the sudoers man page for the details on how to write a sudoers file.
-#
-
-# Host alias specification
-
-# User alias specification
-
-# Cmnd alias specification
-
-# Defaults specification
-
-# Runas alias specification
-
-# User privilege specification
-root	ALL=(ALL) ALL
-
-# Uncomment to allow people in group wheel to run all commands
-# %wheel	ALL=(ALL) ALL
-
-# Same thing without a password
-%wheel	ALL=(ALL) NOPASSWD: ALL
-
-# Samples
-# %users  ALL=/sbin/mount /cdrom,/sbin/umount /cdrom
-# %users  localhost=/sbin/shutdown -h now